Identification of mechanisms of ion induced electron emission by factor analysis

SURFACE SCIENCE

卷:579

Article

Bajales, N ; Montoro, S ; Goldberg, EC ; Baragiola, RA ; Ferrón, J

关键词: ion-solid interactions;    secondary electron emission;    plasmons;    Auger electrons;   

DOI  :  10.1016/j.susc.2005.02.008

来源: Elsevier

【 摘 要 】

Introducing the use of the Factor Analysis method to analyze electron emission spectra we identify different mechanisms for electron emission from clean Al surfaces under bombardment by Ar+ and Li+ ions. The analysis of the energy electron emission distributions and their dependence on incoming ion energy allows separation of the direct contribution of Auger neutralization from that of plasmon de-excitation and cascade electrons due to kinetic emission. Similarly, the analysis shows that, under our experimental conditions, plasmons are excited by fast Al-2p Auger electrons produced in symmetric Al-Al encounters in the atomic collision cascades initiated by the projectiles. (c) 2005 Elsevier B.V. All rights reserved.

【 授权许可】

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